Composite signaling and telephone system.



PATENTED MAR. 17. 1908.

H. 0. HUGE. COMPOSITE SEGNALING AND TELEPHONE SYSTEM.

APPLICATION FILED :TUNE 14.1906.

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nectiori" telephone receiver terminal and the other HARRY '0. RUGH, OF SANDWICH, ILLINOIS.

SOMPOSITE SIGNALING AND TELEPHONE SYSTEM.

N iesaam.

Specification of Letters Patent.

Patented March 17,1908.

Application filed Jun'e 14, 1906; Serial No. 321,769.

To all whom it may concern:

3e it known that I, HARRY O. HUGH, a. CltlZQIl of the .United States, residing at Sandwich, .in the county of Dekalb and State of Illinois, have inventeda certain new and useful Improvement in Composite Signaling and Telephone Systems, of which the following is a-full,-clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to electrical systems for transmitting intelligence, and finds a most useful embodiment in composite Sig 'naling and telephone systems wherein the same line conductors act to convey telephonic and telegraphic currents. in the usual embodiment of my: invention, a transmission line is employed to connect telegraph stations and telephonic outfits are connected between said telegraph stations. telephonic outfits are connected with the transmission'line, tWo'sets of coils are employed, preferably each containing two coils preferably of the same ohmic resistance', one of. each pair of coils possessing high impedance and the other preferably little or no impedance. The telephone re-, ceiver has its terminals connectedor adapted for connection with the two sets of coils, the connection of one telephone receiver terminal being between the coils of one set or pair andthe connection of the other telephone receiver being between the coils of the One impedance coil is other set or pair. interposed between one telephone receiver terminal and one telegraph station and the other impedance coil is interposed between the other telephone receiver terminal and the, other telegraph station. .One noninductive resistance coil -or connection is d between one telephone receiver l 'and one telegraph station and the ductive resistance coil or conconnected between the other telegraph station. By this arrangement, the telegraphic currents [ind access through the two setsof coils in parallel. The impedance coils force said incoming telephonic currents through the non-inductive resistance, coils or connections and the telephone receiver, associated therewith. In short, it will. be seen that I have provided-at each telephone station a quadrilateral, two opposite sides of which contain the impedance here the devices that. I have described, while the other sides of the quadrilateral include means whereby the telephonic currents may be conveyed. These latter sides of the quadrilateral may, if it is desired, include impedance windings that are shunted by condensers, the condensels permitting the passage of telephonic currents whilethe impedance devices'permit the passageol' telegraphic currents. I

I will explaininy inventionmore fuhy by reference to the accompanying drawing, in which Figure 1 illustrates the preferred embodiment of my invention, and Fig. 2 illustrates another embodiment the invention.

Like parts are indicated'by similar characters of reference in both figures.

Transmission line 1 is shown as forming telegraphic connection between two telegraph stations, A, B, and telephonic connection between telephone stations, 0, D. I do not wish to be limited, however, to the number of stations that are connected by said transmission conductor 1. At each telegraph station there is shown a part of the usual telegraphic apparatus, the part illustrated including a line relay 2, atelegraph key 3, together with connections that ground the, conductor 1 at the telegraph stations. There is shown included in series with the line at station A a closed circuit battery 4. At each telegraph station there is also indicated an impedance device5 that serves to prevent the passage of telephonic current to ground or telegraph stations beyond and also to prevent the abrupt rise and fall of the tele graphic impulses, whereby the tendency of ,the telegraphic currents to flow through the circuit with the same battery 8, preferably while the receiveris upon its hook, 'a push button 13 being provided for this purpose which push button, wheii actuated, serves to bring the spring 14 into electrical'connection that are byv induction impressedupon with the terminals. 15, 16 and 17, whereby the winding of said circuit breaker 12 is brought into series with the primary winding 9 and the battery 8,o ccasioning impulsfist e secondary18 of the primary 9, this same secondary also serving to receivetelephonic currents that are impressed thereon by the primary 9 when the button13 is released and the switch-hook is in an elevated position. The capacity of the winding 18 to transmit voice currents and signaling currents, constitutes one feature of my invention, though I do. not wish to be limited in all embodiments of the invention to the character of Sig-1 naling currents and the mechanism for producing the same herein set forth.

The signal device at each telephone station that is responsive to the signaling currents transmitted by the winding 18, desirably resides in a howler 19 of -well known construction, this howler being normally grounded by way of the lower normal contact 20 of the switch-hook, so as to be subject to incoming signaling currents.

Telephonic connections between. telephone stations desir bly includeat each station a' branch conductor 21 that contains a condenser 22, which condenser prevents the passage of thetelegraphic currents there through and, permits the passage of telephonic currents to the corresponding telephone receiver when the switch-hook 6 is released.

At each telephone station there is provided a quadrilateralof connections, two opposite sides 23, 2 1 of which are adapted to bar the passage of telephonic currents, while the remaining sides25, 26 are adaptedto permit of the All the sides of the quadrilateral are adapted to permit of the passage of the telegraphic or other signaling currents that are to be transmitted between the stations a, B. For these purposes, the sides 23, 24 preferably possess high impedance and the other two sides, 25, 26, possess conductivityfor telephonic currents and telegraphic or signaling currents. In the embodiment of the inven tion shown in Fig. 1, the sides 25, 26 possess only non-inductive resistance. in the form shown in Fig. 2, the sides 25, 26 may include impedance devices 27, 28 that permit passage of said telegraphic currents and condensers 29, 30 in shunt of the devices 27 ,28, respectively, that permit the passage of telephonic These condensers constitute nonquadrilaterals also permit the passage of signaling currents occasioned by the operation of the buttons 13 and the circuit breakers 12. r

With either system of connections shown n Figs. and 2, I connect one terminal 31 of ries a conductingplate 33'that isadapt ed to same when the telephone switch is elevated.

and prevented from finding access to the I at station C, for example,

passage of telephonic currents.

sage to ssaeav 'each telephone receiver between the adjacent sides 24, 26, and the other terminal 32 be: 7

4 tween the sides 23, 25.

Each telephone switch-hook desirably 'car-' engage, the two contacts shown above the upon the removal of the corresponding'receiver, this arrangement being provided to prevent signaling currents occasioned upon. the operation ofthe device's12, 13 from passing through the telephone receivers 11.

in operation, it will be seen that telegraphic or other suited signaling currents irnpressed upon the line and at either station 'A or station B, finds aready path over said conductor 1, through all of the sides 23, 24, 25, 26, this telegraphic or.signaling current being smoothed by the impedance device 5 telephonic apparatus by the condensers 22. Telephonic current impressed upon the line finds circuit which maybe traced from the ground permanently attached to the'switch-hook, theupper contact 34, the condenser 22, thecoil 18, the side 26 of the quadrilateral at station 0, the receiver 11, the plate 33 and its then engaged contacts, the side 25 of said quadrilateral, to the station D, where it finds pas.- sage over the side 25 "of the quadrilateral at said latter station, the plate 33 at said latter station, the associate receiver 11, the side 26, the coil 18, the condenser 22, the contact 34 at station D, the switch-hook 6, to ground. The voice currents impressed at station D,

upon the line 1 find a similar circuit, as will be apparent. It will be seen that with reference to the telegraphic or other adaptable signaling currents impressed upon the conductor 1 at sta tion A or B, there is no difference in potential between the terminals of the telephone receivers where they areconnected with the quadrilateral, so that no such current. im 11o pressed at said stations A or B can find pas-' the telephone receivers 11, whereby telephonic communication may be conducted over the transmission line 1 at-the same time signaling currents are passing over said conductor 1 between the stations A and B.

It'will be seen that I have provided a composite signaling and telephone system includmg, a transmission conductor, a plurality-of signaling stations connected thereby, a-plu-' rahty oi telephone stations also connected thereby, apparatus for preventing passage of signaling currents from the former stations through the telephones at said tcle phone stations, a quadrilateral of connections at each 2f,

telephone station, the receiver circuit at each. telephone station having'one terminal connected between two of a pair of the sides of said quadrilateral and the other terminal connected between the two sides of the remaining pair of sides of said quadrilateral, the first pairs of sides of said quadrilateral each being connected in series with the transmission conductor and in parallel with each other, opposite sides of-said quadrilateral possessing impedance to telephonic current and interposed between the associate telephone receiver circuit. and the signaling stations, while the remaining sides of said quadrilateral include non-inductive resistance to permit the passage of telephonic currents,

. all l of'the sides of said quadrilateralallording passages for said signaling currents.

I do not wishto be understood as limiting myself to the location of stations A and C at different geometrical positions, nor to the locations of stations B and D at different geometrical locations, for stations A and may be at -one point, if desired, and stations B and'D at another point, if desired.

The circuit aliorded for the signaling currents occasioned upon the operation of the devices 12, 13 includes the ground permanently attached to a receiver switch-hook, desirably the lower contact 20 at the station where this signalingcurrent initiates, ,the conductor 35 at this station, the associate contacts 15, 16, the associate conductor 36, the condenser 22, the winding 18, the sides 23, 24, 25, 25 of both telephone stations,-the winding 18 at the called telephone station,- the condenser 22, the howler 12 at said latter station, the contact 20 and the grounded receiver switch-hook at the same stat-ion with the latter howler. The how-lei 19 at the callingstation is by the arrangement illustrated, preferably shunted or cut out of cir-' cuit and only the howler at the called statio or stations is operated.

It will be observed that while the condensers 22 are in the telephonic circuit (when the receivers are removed from their switchhooks), they are also included in shunt of the telegraphic keys, these shunts to the telegraphic keys not including the telephone receivers, whereby current impulses occasioned by'the, operation of the telegraphic keys are not impressed upon the telephone receivers, but find their way through the said condensers, which by being included in shunts to the telegraphic keys which do not contain the telephone receivers, are able to shunt the said current impulses from the telephone receivers.

I have shown a composite telephone and telegraph system with but two telephone stations and without any intermediate telephone stations. I do not, therefore, limit myself to a composite system in which there are noother telephone stations than those illustrated connected with the main transmission eonductor, as it is obvious'that other telephone stations with .other circuit arrangements than those illustrated may be connected with the transmission conductor without departing rrom my invention, and as such other telephone stations constitute no part of my present invention, I have not illustrated the same.

I Vhile I have herein shown and particularly described two embodiments of my invention, I do not wish to be limited to precise instrumentalities and circuit connections illustrated, but 4 Haring thus described my invention, I claim as new and desire to secure by Letters- Patent 1. In a composite telegraphand telephone system, the'combination with a transmission conductor all'ording passage for telegraphic current, a plurality of telegraph stations connected thereby, a plurality of telephone stations also connected thereby, said transmission conductor normally permanently extending to all of said telegraph and telephone stations, a quadrilateral of connections at each telephone station, the telephone receiver circuit at each telephone stat-ion havingon'e terminal connected between two of a pair of the sides of said quadrilateral and the other terminal connected between the two sides of the remaining pair of sides of said quadrilateral, the said-pairs of sides of said quadrilateral each being connected in series with the transmission conductor, the telegraph stations also being in serial relation with said quadrilateral, opposite sides of said quadrilateral possessing impedance to telephonic current and being interposed between the associate telephone receiver circuit and the telegraph stations while the remaining sides of said quadrilateral ail'ord passage for voice currents,'all of the sides of said quadrilateral afiording passage 'for telegraph currents.

2. In a composite telegraph and telephone system, the combination with a transmission conductor affording passage for telegraphic current, a plurality of telegraph stations connected thereby, a plurality of telephone stations also connected thereby, said transmission conductor normally permanently extending to all of said telegraph and telephone stat-ions, a quadrilateral of connections at each telephone station, the telephone receiver circuit at each telephone station having one terminal connected between two of a pair of the sides of said, quadri-.

lateral and the other terminal connected between the two sides of the remaining pair of sides of said quadrilateral, the said pairs of sides of said quadrilateral each being connected in series with the transmission conductor, the telegraph stations also being in serial relation with said quadrilateral, uposite sides of said quadrilateral possessing rmpedance to telephonic'current and interposed between the associate telephone receiver circuit and the telegraph stations-while the remaining sides of said quadrilateral afiord passage for voice currents, all of thee ides of said;

quadrilateral affording passage for telegraph currents, conductors extending from the transmission conductor and completing the conduct-or afi'ording passage for telegraphic current, a plurality of telegraph stations connected thereby, a plurality of telephone stations' also connected thereby, said transmis sion conductor normally permanently extending to all of said telegraph and telephone stations, a quadrilateral of connections at each telephone station, the telephone receiver circuit at each telephone station having one'terminal connected between two of a pair of the sides of said quadrilateral and the other terminal connected between the two sides of the remaining pair of sides of said seesaw quadrilateral, the said pairs of sides of said quadrilateral each being connected in series with the transmission conductor, the telegraph stations also being in serial relation with said quadrilateral, opposite sides of said quadrilateral possessing impedance to telephonic current and interposed'between the associate telephone receiver circuit and the telegraph stations while the remaining sides of said quadrilateral afford passage for Voice. currents, all of the sides of said quadrilateral affording passage for telegraph currents, and conductors extending from the transmission conductor and completing the telephonic circuit.

In witness whereof, I hereunto subscribe my name this 7th day of June A. 1)., 1-906.

HARRY O, RUGH.

"Witnesses:

LEON Sra'on, G. L. ;CRAGG-. 

